(19)

(11)

EP 4 392 722 A1

(12)

(43) Date of publication: 03.07.2024 Bulletin 2024/27 (21) Application number: 22862152.0 (22) Date of filing: 26.08.2022

(51) International Patent Classification (IPC):  F24T 10/20(2018.01) F03G 7/04(2006.01) (52) Cooperative Patent Classification (CPC): Y02E 10/10; F03G 4/001; F03G 4/02; F03G 4/031; F03G 4/026; F03G 4/033; F24T 50/00; F24T 10/20; F24T 2010/50; F24T 2010/53; F24T 2010/56; E21B 43/26; E21B 2200/06 (86) International application number: PCT/US2022/041733 (87) International publication number: WO 2023/028336 (02.03.2023 Gazette 2023/09)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 26.08.2021 US 202163237425 P 24.08.2022 US 202263400687 P (71) Applicant: Colorado School Of Mines Golden, Colorado 80401 (US)	(72) Inventor: FLECKENSTEIN, William W. Lakewood, Colorado 80401 (US) (74) Representative: Eisenführ Speiser  Patentanwälte Rechtsanwälte PartGmbB Stralauer Platz 34 10243 Berlin 10243 Berlin (DE)